Add libhardware_headers and libsystem_headers to modules

Bug: 33241851
Test: Build target and pass CTS audio
Change-Id: Ibf8b0662cd7aea5592522b3ead2d8eb2aaac6c04
diff --git a/voice_processing/Android.mk b/voice_processing/Android.mk
index e8878ee..7ebeb70 100644
--- a/voice_processing/Android.mk
+++ b/voice_processing/Android.mk
@@ -23,4 +23,5 @@
 
 LOCAL_CFLAGS += -fvisibility=hidden
 
+LOCAL_HEADER_LIBRARIES += libhardware_headers
 include $(BUILD_SHARED_LIBRARY)